Photoacoustic and photothermal techniques are reviewed with emphasis on possible industrial applications. Their application to the physics of materials, to chemical processing, surface analysis, powder technology, high-temperature phases, etc., could have considerable impact on basic industrial know-how, and might even lead to methods for improved process and product control. While still mostly confined to the laboratory, therefore, their simplicity and robustness would make photoacoustic and photothermal techniques particularly attractive to industrial environments